三、小腸寄生蟲(chóng)感染
消化系統(tǒng)

        (一)蛔蟲(chóng)病及鉤蟲(chóng)病蛔蟲(chóng)病是由于蛔蟲(chóng)寄生于人體所引起的疾病?；紫x(chóng)受精卵被人吞食后幼蟲(chóng)在小腸上段孵出,穿出小腸壁,進(jìn)入靜脈循環(huán)移行到肺,經(jīng)氣管到咽喉部再被吞下,在小腸發(fā)育為成蟲(chóng),引起腸蛔蟲(chóng)癥。腸蛔蟲(chóng)多無(wú)癥狀,兒童期常    （共 595 字）     [閱讀本文] >>